My 91 rs 305 v8 idles at about 1700rpm and I dont know what to do to slow it down it runs great but just idle is to high is there a wire that my not be hooked up on the throttle body it is fuel injected or maybe something that I can replace that might not be workin right? thx

I know someone who had the same problem it turned out to be the base gasket between the throttle body unit and the intake manifold.

Steve R.

Steve is right, I would be looking for a vacuum leak either on the engine or involving one of the vacuum hoses running off of the engine.

I second the base gasket, I repaired the very same problem by replacing the base gasket. If you have a propane torch, open it and move it around the base of the TBI and see if the idle straightens out.

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Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm (http://www.clark.net/pub/chevelle/mcc.htm)
the bitterness of poor quality remains, long after the sweetness of the low price is forgotten

Pull off the air cleaner top and locate the idle air throat. Might hear it sucking air. Should be right at the Idle air controller. With the engine idling hot, stick your finger in the well. If the engine slows way down you have a problem with the IAC, throttle position sensor, or maybe a temp sensor is reading very low. If the idle stays up, a vacuum leak is probable, a large one.